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E 136 - XTA 624 C1 Eng.
22.11.10 AM REV. 02
We reserve the right to make changes without notice
COSTER
XTA 624 C1 Eng.
• Temperature control in air handling units
• Communication systems :
– C-Bus : XTA 624 Telemanagement optional;
to enable Telemanagement use the "C-Bus Plug-in" type ACB 400 C1 or later,
to be ordered separately as accessory.
• 24 V ~ power supply; DIN rail mounting
1. APPLICATION
XTA 624 is designed for temperature control in air handling units composed of:
• 2 hot/chilled water or vapor batteries with 3-wire modulating control
or electric batteries with 1-,2-, or 3-stage On-Off control
or direct expansion batteries with 1- or 2-stage On-Off control
• 1 air mixing unit with 0...10 V– air damper actuators
or 1 heat recuperator with 0...10 V– or On-Off control (CSV 304 converter).
The equipment can be included in a Telemanagement system through the C-Bus connection.
2. OPERATION
The main features of XTA 624 are as follows:
• Two 3-wire modulating outputs or 2-stage On-Off (two equal loads) or 3-stage (two unequal loads) outputs,
configurable for:
– room temperature control (heating or cooling) with summer external compensation if desired, minimum
and maximum flow limits to prevent cold drafts.
– flow temperature control (heating or cooling) with winter and summer compensation if desired
– pre-heating temperature control at a fixed value
• One 0...10 V– progressive output, configurable for:
– air mixing control based on temperature comparison or with minimum external air limit
– heat recuperator On-Off control according to room-external temperature comparison
• 2 pump control On-Off outputs accoring to output load
• Manual seasonal switching from a display or an external switch.
• Remote-controlled temperature setting adjustment
• Alarms for short and open detector circuits and for system and equipment malfunction.
• Programming by means of 25 24-hour programs, five 7-day programs, and 25 annual period programs
• Enabled for data transmission via C-Bus with local PCs or remote Telemanagement PC.
• Optional C-Bus transmission of data with local PCs or remote Telemanagement PC
.
To enable data transmission and Telemanagement use the “C-Bus Plug-in” type ACB 400 C1 or later
To communicate locally with a PC use the test Plug-in type ACX 232
3. ACCESSORIES
No. Description Type Application range Sensing Code Data
element sheet
1 Duct flow air temperature detector STA 010 0…60 °C NTC 10 k
Ω B1 –
1 Duct outside air temperature detector STA 001 –30…+40 °C NTC 1 k
Ω B2 –
or wall outside air temperature detector SAE 001 –30…+40 °C NTC 1 k
Ω B2 –
1 Duct extract air temperature detector STA 010 0…40 °C NTC 10 k
Ω B3 –
or room air temperature detector SAB 010 0…40 °C NTC 10 k
Ω B3 –
1 Duct pre-heating temperature detector STA 010 0…40 °C NTC 10 k
Ω B4 –
1 Temperature set-point adjuster CDB 100 ± 5 °C – Rt° –
1 Outside air minimum distance positioner PCS 04 – – Rs –
Accessory for Telemanagement
1 Plug-in for communicating via C-Bus
ACB 400 C1 – – –
E 136
22.11.10 AM
REV. 0
2
BUS
C
OPTIONAL
TEMPERATURE CONTROLLER FOR TWO-BATTERY
AIR HANDLING UNIT
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